package com.heima.wemedia.service.impl;

import com.alibaba.fastjson.JSON;
import com.baomidou.mybatisplus.core.toolkit.Wrappers;
import com.google.common.collect.Maps;
import com.heima.apis.article.IArticleClient;
import com.heima.common.aliyun.GreenImageScan;
import com.heima.common.aliyun.GreenTextScan;
import com.heima.common.tess4j.Tess4jClient;
import com.heima.file.service.FileStorageService;
import com.heima.model.article.dtos.ArticleDto;
import com.heima.model.common.dtos.ResponseResult;
import com.heima.model.wemedia.pojos.WmChannel;
import com.heima.model.wemedia.pojos.WmNews;
import com.heima.model.wemedia.pojos.WmSensitive;
import com.heima.model.wemedia.pojos.WmUser;
import com.heima.utils.common.SensitiveWordUtil;
import com.heima.wemedia.mapper.WmChannelMapper;
import com.heima.wemedia.mapper.WmNewsMapper;
import com.heima.wemedia.mapper.WmSensitiveMapper;
import com.heima.wemedia.mapper.WmUserMapper;
import com.heima.wemedia.service.WmNewsAutoScanService;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang3.StringUtils;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.scheduling.annotation.Async;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Isolation;
import org.springframework.transaction.annotation.Transactional;

import javax.imageio.ImageIO;
import java.awt.image.BufferedImage;
import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.util.*;
import java.util.stream.Collectors;

@Service
@Transactional(isolation = Isolation.READ_COMMITTED)
@Slf4j
public class WmNewsAutoScanServiceImpl implements WmNewsAutoScanService {
    @Autowired
    private WmNewsMapper wmNewsMapper;

    @Autowired
    private GreenTextScan greenTextScan;

    @Autowired
    private GreenImageScan greenImageScan;

    @Autowired
    private Tess4jClient tess4jClient;

    @Autowired
    private FileStorageService fileStorageService;

    @Autowired
    private IArticleClient articleClient;

    @Autowired
    private WmChannelMapper wmChannelMapper;

    @Autowired
    private WmUserMapper wmUserMapper;

    @Autowired
    private WmSensitiveMapper wmSensitiveMapper;

    /**
     * 自媒体文章审核
     *
     * @param id 自媒体文章id
     */
    @Override
    @Async  // 标明当前方法是一个异步方法
    public void autoScanWmNews(Integer id) {
        // 1.查询自媒体文章
        WmNews wmNews = wmNewsMapper.selectById(id);
        // TODO 明明有却查不出来导致报错！！！
        //  @Transactional(isolation = Isolation.READ_COMMITTED, propagation = Propagation.REQUIRES_NEW)

        // 判断文章是否存在
        if (wmNews == null)
            throw new RuntimeException("com.heima.wemedia.service.com.heima.schedule.service.impl.WmNewsAutoScanServiceImpl.autoScanWmNews:文章不存在");

        if (wmNews.getStatus().equals(WmNews.Status.SUBMIT.getCode())){
            // 从内容中抽取纯文本内容和图片
            Map<String,Object> textAndImages = handleTextAndImages(wmNews);

            // 自管理敏感词审核
            boolean isSensitive = handleSensitiveScan((String) textAndImages.get("content"), wmNews);
            if (!isSensitive) return;

            // 2审核文本内容 阿里云接口
            boolean isTextScan = handleTestScan(textAndImages.get("content").toString(),wmNews);
            if (!isTextScan)
                return;
            // 3审核文章图片 阿里云接口
            boolean isImageScan =  handleImagesScan((List<String>) textAndImages.get("image"),wmNews);
            if (!isImageScan)
                return;
            // 4.审核成功，保存app端的相关的文章内容
            ResponseResult responseResult = saveAppArticle(wmNews);


            if (!responseResult.getCode().equals(200)){
                System.out.println("保存错误的状态码："+responseResult.getCode());
                throw new RuntimeException("com.heima.wemedia.service.com.heima.schedule.service.impl.WmNewsAutoScanServiceImpl.autoScanWmNews:文章审核，保存app端相关文章数据失败");
            }

            // 回填article_id
            wmNews.setArticleId((Long) responseResult.getData());
            updateWmNews(wmNews,(short) 9,"审核成功");
        }
    }

    /**
     * 自管理的敏感词审核
     *
     * @param content
     * @param wmNews
     * @return
     */
    private boolean handleSensitiveScan(String content, WmNews wmNews) {
        boolean flag = true;
        // 获取所有的敏感词
        List<WmSensitive> wmSensitives = wmSensitiveMapper.selectList(Wrappers.<WmSensitive>lambdaQuery().select(WmSensitive::getSensitives));
        List<String> sensitiveList = wmSensitives.stream().map(WmSensitive::getSensitives).collect(Collectors.toList());
        // 初始化敏感词库
        SensitiveWordUtil.initMap(sensitiveList);
        // 查开文章章中是否包含敏感词
        Map<String, Integer> map = SensitiveWordUtil.matchWords(content);
        if (map.size()>0){
            updateWmNews(wmNews,(short)2,"当前文章存在违规内容"+map);
            flag = false;
        }
        return flag;
    }

    /**
     * 保存App端文章相关内容数据
     * @param wmNews
     */
    private ResponseResult saveAppArticle(WmNews wmNews) {
        ArticleDto dto = new ArticleDto();
        // 属性的拷贝
        BeanUtils.copyProperties(wmNews,dto);
        // 文章的布局
        dto.setLayout(wmNews.getType());
        // 频道
        WmChannel wmChannel = wmChannelMapper.selectById(wmNews.getChannelId());
        if (wmChannel != null)
            dto.setChannelName(wmChannel.getName());

        // 作者
        dto.setAuthorId(wmNews.getUserId().longValue());
        WmUser wmUser = wmUserMapper.selectById(wmNews.getUserId());
        if (wmUser != null)
            dto.setAuthorName(wmUser.getName());

        // 设置文章ID
        if (wmNews.getArticleId() != null)
            dto.setId(wmNews.getArticleId());

        dto.setCreatedTime(new Date());

        ResponseResult responseResult = articleClient.saveArticle(dto);
        return responseResult;
    }

    /**
     *审核图片
     * @param images
     * @param wmNews
     * @return
     */
    private boolean handleImagesScan(List<String> images, WmNews wmNews){
        boolean flag = true;
        if (images == null || images.size() == 0)
            return true;
        // 下载图片 minio
        // 图片去重
        images = images.stream().distinct().collect(Collectors.toList());
        List<byte[]> imageList = new ArrayList<>();

        try{
            for (String image : images) {
                byte[] bytes = fileStorageService.downLoadFile(image);

                // byte[] 转换成为 BufferedImage
                ByteArrayInputStream in = new ByteArrayInputStream(bytes);
                BufferedImage bufferedImage = ImageIO.read(in);

                // Tess4j 识别图片中文字
                String result = tess4jClient.doOCR(bufferedImage);

                // 过滤文字
                boolean isSensitive = handleSensitiveScan(result, wmNews);

                if (!isSensitive)
                    return isSensitive;

                imageList.add(bytes);
            }
        }catch(Exception e){
            e.printStackTrace();
        }

        // 审核图片
        try {
            Map map = null ;
            // 阿里云图片审核方法暂不审核
            //map = greenImageScan.imageScan(imageList);
            if (map != null) {
                // 审核失败
                if (map.get("suggestion").equals("block")) {
                    flag = false;
                    updateWmNews(wmNews, (short) 2, "当前图片中存在违规内容");
                }
                // 不确定信息，需要人工审核
                if (map.get("suggestion").equals("review")) {
                    flag = false;
                    updateWmNews(wmNews, (short) 3, "当前图片中存在不确定内容");
                }
            }
        } catch (Exception e) {
            flag =false;
            e.printStackTrace();
        }
        return flag;
    }

    /**
     * 审核纯文本内容
     * @param content
     * @param wmNews
     * @return
     */
    private boolean handleTestScan(String  content, WmNews wmNews) {
        boolean flag = true;
        if ((wmNews.getTitle()+ "-" + content).length() == 0)
            return true;
        try {
            Map map = greenTextScan.greeTextScan(wmNews.getTitle()+ "-" + content);
            if (map != null){
                // 审核失败
                if (map.get("suggestion").equals("block")){
                    flag = false;
                    updateWmNews(wmNews, (short) 2, "当前文章中存在违规内容");
                }
                // 不确定信息，需要人工审核
                if (map.get("suggestion").equals("review")){
                    flag = false;
                    updateWmNews(wmNews, (short) 3, "当前文章中存在不确定内容");
                }
            }
        } catch (Exception e) {
            flag =false;
            e.printStackTrace();
        }
        return flag;
    }

    /**
     *
     * @param wmNews
     * @param status
     * @param reason
     */
    private void updateWmNews(WmNews wmNews, short status, String reason) {
        wmNews.setStatus(status);
        wmNews.setReason(reason);
        wmNewsMapper.updateById(wmNews);
    }

    /**
     *  1.从提取自媒体文章的内容中提取文本和图片
     * @param wmNews
     * @return
     */
    private Map<String, Object> handleTextAndImages(WmNews wmNews) {
        // 存储纯文本
        StringBuffer stringBuffer = new StringBuffer();
        // 存储图片路劲
        List<String> images = new ArrayList<>();
        // 1提取自媒体文章的内容中提取文本和图片
        if (StringUtils.isNotBlank(wmNews.getContent())){
            List<Map> maps = JSON.parseArray(wmNews.getContent(), Map.class);
            for (Map map : maps){
                if (map.get("type").equals("text")){
                    stringBuffer.append(map.get("value"));
                }
                if (map.get("type").equals("image")){
                    images.add((String) map.get("value"));
                }
            }
        }
        // 2提取文章封面
        if (StringUtils.isNotBlank(wmNews.getImages())){
            String[] split = wmNews.getImages().split(",");
            images.addAll(Arrays.asList(split));
        }
        Map<String ,Object> resultMap = new HashMap<>();
        resultMap.put("content",stringBuffer.toString());
        resultMap.put("image",images);
        return resultMap;
    }
}
